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The rotary dryer and roaster for fresh chili by using heat energy from LPG was designed and fabricated as 60 cm × 120 cm of cylindrical drum. It was tested with 3, 5, and 7 rpm of different speeds at a constant temperature of 105°C. A Chilli sample of 13 kg was dried from an initial moisture content of 77.63% wb to 13% wb. The test showed that at a speed of 5 rpm, the quality of dried chilli was the...